Signal or control mechanism for railway-trains.



J. T. THOMPSON.

' SIGNAL OR OONTROL MECHANISM FOR RAILWAY TRAINS.

APPLIGATION FILED HILN. 5, 1912.

Patented July 22, 1913.

2 SHEETS-SHEET 1.

J. T. THOMPSON.

SIGNAL 0R CONTROL MECHANISM FOR RAILWAY TRAINfi.

APPLICATION FILED JAN. 5, 1912 Patented July 22, 1913.

2 SHEETSSHEET 2.

ployed at the far end of each block a battery 50, bridged across the track rails which con trols a relay magnet 51, bridged across the track rails at the entering end of the block. One of the traclt rails adjacent to the end of the block is provided with two relatively short rail sections 54: which are insulated from each other and from the regular track rails. and are sustained by fish plates extending across the two rail sections. Bond wires 55 extend around said insulated rail sections to maintain electric continuity of the track rails of the blocks. 56, 56 designate spring terminals which are insulated from each other and are connected to the rails sections 53 Si. and said terniina s are adapted to he connccicd by means ct contacts 58 carried by swinging armaturcs 59 that are acted upon by the track relay mag nets Til. The lengths: of the rail section 33, 54 are such, with respect to the distan es apart of the wheels. 35%, 59 and i2, that when the wheels 39 and i2 are traveling, one n one short rail section and the other on the, othcr,rail section, the wheel 39 is traveling on the regular track rail in rear of the insulated se lions, but said latter wheel will reach the rail section 53 before the wheel 38 has passed off the section 5-4. [t' it be as sumcd in Fig. '-l that the contact 58 closed upon the spring terminals 55. the circuit of the magnet and the battery 33 will e closed from one side of the battery 33 through the wire t0. the wheel 42, rail section 53. the spring tcrn'iinals .36 to rail s tion Si. and thence through the wheel 35-3 and axle 3!) ba k to the other side of the battery. When the wheel i-lS passes oil the insulated rail section S-t the wheel 35) will have passed onto the insulated rail section 52%, so that the circuit will, at such time, be closed through the wheel t2. the rail section 54, spring terminals .36. rail section 53 and wheel 39 and its axle 5? back to the battery 33.

In the foregoing inscription it has been assumed that the circuit is closcd at the contacts 56. The said terminals so. when closed by the contact 533. and the rail sections 5."), 54 connected thereto constitute, when the contact wheels 38, 39 and t? are passing thercover. a loop or partial local circuit through which the controlling circuit is maintained closed. notwithstanding the interruption in the, track rail due to the insulation between the rail section and the regular traclc rails. so that there, will be no break in the controlling circuit, and the train will pass over said insulated rail sections without operating the train control device or signal apparatus. It the loop be open by the separation of the contact and the terminals 5?. however: as shown in block E in Fiji. 4, the control-v ling circuit will be interrupt d or opened when the wheels 38, 39 and 42 pass over the insulated rail sections, with the result of decncrgizing the magnet 32 and operating the train control device or signal or both. The said loop or partial local circuit may be opened at the terminals 56 in any convenient manner to effect this result, as for instance, by the throwing of a switch, a semaphore, the opening of a bridge or by otherwise short circuiting the track relavs 51.

If desired I may employ, in connection with the train control device, a visual signal device, embracing a lamp 62, included in the circuit of a battery 63, the two sides of which are adapted to be closed by a contact piece 64 on the rear or tail end of the valve actuating arm 22, said contact piece being adapted for engagement with the terminals ('15 of the cir uit of the battery 63.

in accordance with my invention, 1 provide means whereby the controlling or sig naling' device will be rendered inoperative un h r a certain predetermined speed of the train or at such low speed at which the train may sa tely enter a. block in which the signals are set against the train to indicate eithe a full stop or caution, so that when the train is running at the predetermined minimum speed. it will not be arrested or the signal operated. I propose also to so arrange the mechanism that the train control or signal device will be operated at a predetermined maximum speed of the train, or at such speed beyond which it may be determined it is not safe to operate the train. I may cli'cct these results by the use of a suit able governor device. controlled by the speed of the train and adapted to snunt the controlling circuit or to operate switching or cut out terminals in the operating circuit, and have herein shown one convenient form of mechanism for this purpose which I will now describe.

Arranged in the controlling circuit is a branch wire connected between the wires 35 and 40. contacts 71'. 7- and a bridge piece T3 adapted at certain times in the operating of the mechanism to bridsic between said contacts and connect the ranch circuit between the wires 13 and 40. When the bridge piece 73 connects the contacts T1, T2 the pathof the cir uit. which includes the battery; 33 and the magnet will be shorter or of lower resistance through the branch 70 than through the complete circuit before described. so that the operating circuitwill be shunted at such time through the branch circuit.

The bridge piece 73 is shown as forfn-ed on the upper end of a governor controlled, verticallv movable stem 75. which is provided below the bridge piece with a disk 76 (Fl '2) having an inclined or conical periphery.. The said stem 75 is mounted and vertically movable in a rotatable frame 78 to which 'are piv'eted at 79 governor ere-1s 80' having Weights 81' at the1r lower ends and nmn'mlly warclly. by the springs. L llie iipi'ier ends of said governor arms. beyond their? "pivots.

z'are'convexiy mun'cied zit- 83 engage with the conical periphery efzthe dis-1h T6 in such fmzi'nner that when the governor arms ere 'thrown'oulgwa rdly by centrifugal. ectiezi the disk and the stem areieeus ecl to e. there by raising-the bridge merge-"2'3 Away from the contacts'izl, 72 and epeningl he liiruneh qcircuit 70 .Whereu .on 'the'eircuil; will he es,

"zincl 42' and the lraek'mil. frame m nmyhe driven from one. (if ihe exiesef ehe lei, herein shown, 1)

tziblishedfthmiiigh. the trziel; Wheelg 355,

line

f()'l110ii""(2,' as; the axle ll. 5V5 means of ii" heii H5 sheet a with a. pinion 1%? that; meshes with a pinion fixed to lie re tative governor frame means described, when the iIOVQlllOI. frzune.

- trifupial aetion, against the :xctimi of the sprlngs 82, and Operate to raise thefslem i 0 "iiisegn' e'clzibhe bridge piece $3 from lhe contacts 71, 72, of the branch GiliClll'fi ililkl mil; the. branch ail-cull: enem the cen'tz'olhegg;ens

. evil; and to complete the eenl'rollirw iiicllil' throughthe'wheelg 3 8, 39 anal (leser'ihe'ri. Thefszu'ne geverne-r (leviee 11m he employed te-open the nei'ninlly (iUSGll mil trollingeireuil at a time when the train :ei'.

lzains predetermined. meximum .speeri mi 'lhe engine o r-irain. '-.As shown the cenlrollinif.

circuit embraces a. stationary Contact 92 eml a pive talswiteh 93- arlapted. for contact nil:

.1 on'eentltl ereof with the stationary eenteel; Saul switch 93 base laterally extend ng arm 94 WhICll 118$ above i1 flange 0'1: disk 95 speed (if file governor the sufficiently-t0 bring the 0n the governer elem 75 heiween the bridge L- vw "PIQCG 73 and therlxsk 1e. KKK-1th Bl'LlS mnstrueti0n',11130n aprecleterm inerl maxim u in re. ii ire stem 75 .misml 5.3.5 info (:0 mm

' with the'a'rm 9401? the swileh lever 93 ziml .Siticins vhich they assumewhei thus 015011 theoperiifuin'g' eirciiit. \liil) the same result as when the circuit .lH .bmrmi ill.

'the track rails; that is leany, lie leiinei- 1gize the 1112 g1iet 32. wfllhus if i l he nesu nvii llmi the nm'xili'nun safety speed u'f't'he lx'z inis 55 ninely miles per, hour, an increase (if (he speed beyond lhat .Will eel: on the gavel-nor to open the (:1r ':ui i1 at the switch 93] e'iiil' thereby operate the 11-51111 control device 01" signah r h0th. I --In 1 ig ."4; the pm'ls' ml the gm'ernm' illlll the partsessociuteritherewith are iii the m- 1 ihe irniu is running all a speed lielii'emz. the prrwlelm-- mined 'n' 1inimum sprei'l ill 'whieh lhe '&

illi 7 Control device and signal ere. ii'ieperzwii'e .ns r merely ene "aspect is en gmhie of m'ssuming: varying-2" 'silien Whieh they immuneAmen the lriiih hm;

});!l--"Oll :2 min-121312111 i-i'peeih iii-I sm'ilfirti: 9i he my. shown as; ilu-mi'n ever m (apes; lhe up erai'iilg eii'eiiiiu.

W511i i 1.116 iriieli provenmilra to :1 iwe Wavy inn-la, 11,.

'leri ie.

i'eiilivn :iiiil llml lhe imemmii in. '1

l ileum ma my in'i'eniiinii;---; 7 l. A; slljlmi 1, emuii'el Bier-helium for rank we trains emln-m-ingz; 2i emii 'ulimgg r eignnlmg iii-rive Curried hjJ- thi- NW1 :1 m mwhen in Marvel on the lrzu-l' 'l. mid enamel. (lei ieee living): insulziieii. 'lrem 'eaeh ether. means at i-mzirelleifl h {he Speed m "the :mlmmalir-nlly ripening one i'eiile e milling device 'ehi-ried by the train, :1 mvm heiarranged:when in one [)(lSll'lOlllO lnllill uiin shill (leviedinoperative and when in another pfifilliim to render i'he iie'vieeeperwlire, eh eluei'roinz ghel i-fiurieki hy the ion-e .lneiive l i'rnngejeil re hehl sziiil memherin'lhe hes-iii: 'iimi meeiimmil. normally (.lUHQll eezilrmlmg eii'i-ui iiiCilik'i 1g; s-azml mzigm :1 hei'im'y will wnijnei (lzwierf. which Ch li-er l'riivel 'lhe em; 1. ii. mi l i-m'il zic file iii! railway trains; ei'iihrzwing 21' email-oiling m sl g ngzlmgz ileum..eiiiziieil hv the train. ii :llU'JZ-q iiei'hmllv' iiliiliiilll} mildileviiie iii" inepem izailjien to render lhe derive were HliUWll in Fig. i is (me the M ed of controlling cirevlce gOjm a aximnn'l s in cpcrab.

fore slgnaturc in the 40 115 18th day of in: he

fined In upon 525i se #smu 3 R'QMSIC-Jfl'l'i \me Kimmy, that if dz: \imn E. zufi 5W0 wiinessi".

JAEHLS T. THOMPSON.

W7 LIAM L. HALL,

A1 GOLDBERGER.

1.5K. 'tness k E I D ill" and bridge contacts in an 

